You can give an endless number of ships the same name, this can be a problem too. So why allow this, but not to change ship names each day?

And i don't think it is really a problem that you can think that there are more ships, you can still count the ships, if you know the combar power you can calculate the fleet size, or calculate it based on the assumed daily income

And if it is posted in the/a forum when you rename a ship, all players can look which player renamed which ship..i

And to rename all ships at the same day if you can only rename on a planet with shipyard is a great effort most times, so you will rename the ships by and by. And if someone still thinks the fleet is bigger then it really is because of the renaming, the only one-per-week wouldn't help either..

but if you reconfigure you ship, it happens in real-time. Why should this be different by renaming you ship? But I think, renaming ships isn't much important, or? You could live with and it has the same combat power